Finite Element Analysis of In-Door Non-Structural Components under Seismic Excitations


Non-structural components such as furniture, ceilings and lightings show different behaviours during earthquakes depending on input seismic waves, floor heights, friction coefficients of floors, locations of other objects in the vicinity, and so on. These conditions may vary in each situation and it is very difficult for people to understand and apply appropriate anti-seismic means to those components around them. In this study, an effective finite element code to simulate the behaviours of in-door non-structural components under seismic excitations was constructed to use as a risk evaluation tool in the near future. Numerical models of furniture and ceilings with lightings were constructed using linear Timoshenko beam elements and the analyses were conducted using the adaptively shifted integration (ASI) – Gauss code [1]. A sophisticated penalty method [2] was applied to realize the slip and contact motions of furniture with and without casters.Some validations by experimental results are shown and the behaviours of non-structural components in a room are visualized by a VR system constructed using the Unity software.